2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 2: Gudenau Intl. Symp. / Iron and Steel Making

Editors:	Kongoli F, Kleinschmidt G, Pook H, Ohno K, Wu K
Publisher:	Flogen Star OUTREACH
Publication Year:	2015
Pages:	340 pages
ISBN:	978-1-987820-25-6
ISSN:	2291-1227 (Metals and Materials Processing in a Clean Environment Series)

< CD shopping page

Temperature Distribution Simulation of Iron Ore Sintering Process Based on Consideration about Fine Coke Combustion Behavior in Quasi-Particle

Ko-ichiro Ohno¹; Hiroshi Ogi¹; Keigo Noda²; Koki Nishioka³; Takayuki Maeda¹; Masakata Shimizu¹; Kazuya Kunitomo¹;
¹KYUSHU UNIVERSITY, Fukuoka, Japan; ²NIPPON STEEL & SUMITOMO METAL CORPORATION, Kimitsu City, Japan; ³NIPPON STEEL & SUMITOMO METAL CORPORATION, Kamisu, Japan;
Type of Paper: Invited
Id Paper: 266
Topic: 2

Abstract:

Numerical simulation of temperature distribution in the iron ore sintering process is one of the most important techniques to maintain a high quality of iron ore sinter. A correct comprehension of coke combustion rate is necessary for estimation of temperature distribution in this process. However an ordinal equation, "Hottel's equation", for estimation of coke combustion rate cannot correctly describe the combustion behavior of fine coke in quasi-particle because it is normally applied for single particle coke combustion behavior. The purpose of this study is to correctly estimate temperature distribution in the iron ore sintering process using numerical simulation model based on coke combustion rate in the fine layer of the quasi-particle. The following results were obtained. The higher mixing ratio of fine coke made the larger effective diffusion coefficient of oxygen because the higher mixing ratio of coke made the higher void ratio in the sample after coke combustion. More practical temperature distribution could be calculated considering the coke combustion rate in quasi-particle instead of using only "Hottel's equation". A decrease in the temperature distribution in the sintering layer was found in consideration of the liquid phase formation effect on coke combustion rate. This effect will increase by increasing the fine coke amount in the process.

Keywords:

CO2; Carbon; Coke; Combustion; Energy; Gas; Melting; Slag; Temperature;


References:

[1] Y. Hida, M. Sasaki, T. Enokido, Y. Umezu, T. Iida and S. Uno: Effect of the Existing State of Coke Breeze in Quasi-Particles of Raw Mix on Coke Combustion in the Sintering Process, Tetsu-to-Hagané, 68 (1982), 400-409.
[2] E. kasai and Y. Omori: Combustion Rate of Coke at Different Existing States Prepared by Fine Alumina, Tetsu-to-Hagané, 72 (1986), 1537-1544.
[3] E. kasai, S. Wu, T. Sugiyama, S. Inaba and Y. Omori: Combustion Rate and NO Emission during Combustion of Coke Granules in Packed Beds, Tetsu-to-Hagané, 78 (1992), 1005-1012.
[4] K. Sato: Bussei Teisu Suisan Hou, Maruzen Co., Ltd., Tokyo, (1975), 129.
[5] A. S. Parker and H. C. Hottel: Combustion rate of carbon, study of gas-film structure by microsampling, Indust. Eng. Chem., 28 (1936), 1334-1341.
[6] K. Ohno, K. Noda, K. Nishioka, T. Maeda, M. Shimizu: Combustion Rate of Coke in Quasi-particle at Iron Ore Sintering Process, ISIJ Int., 53 (2013), 1588-1593.
[7] K. Ohno, K. Noda, K. Nishioka, T. Maeda, M. Shimizu: Effect of Coke Combustion Rate Equation on Numerical Simulation of Temperature Distribution in Iron Ore Sintering Process, ISIJ Int., 53 (2013), 1642-1647.

Full Text:

Click here to access the Full Text

Cite this article as:

Ohno K, Ogi H, Noda K, Nishioka K, Maeda T, Shimizu M, Kunitomo K. Temperature Distribution Simulation of Iron Ore Sintering Process Based on Consideration about Fine Coke Combustion Behavior in Quasi-Particle. In: Kongoli F, Kleinschmidt G, Pook H, Ohno K, Wu K, editors. Sustainable Industrial Processing Summit SIPS 2015 Volume 2: Gudenau Intl. Symp. / Iron and Steel Making. Volume 2. Montreal(Canada): FLOGEN Star Outreach. 2015. p. 73-82.